Knife



y 1950 H. E. ZURCHER 2,513,905

' KNIFE Filed May 5, 1947 F i g 3.

k 10 Q 26 g 20 Inventor I4 Q Henry E. Zurcher WW FM Patented July 4, 1950 UNITED STATES PATENT OFFICE KNIFE Henry E. Zurcher, Los Angeles, Calif.

Application May 5, 1947, Serial No. 746,137

3 Claims. 1

This invention relates to new and useful improvements in knives and the primary feature of the present invention is to provide a sheath including a razor blade carried by the sheath adapted for use in cutting material otherwise difiicult to sever by the usual knife blade.

Another important feature of the present invention is to provide a knife of the character referred to comprising a razor blade extendable from the knife sheath and novel locking means for adjusting the razor relative to the sheath.

A further feature of the present invention is to provide a knife including a removable razor blade which is quick and readily disassembled from the sheath for sharpening or replacement thereof.

A still further feature of the present invention is to provide a device of the character described which is simple and practical in construction, strong and reliable in use, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational View of the knife showing all blades in a slightly open position;

Figure 2 is a top plan view of the knife showing the knife blades in the sheath, and the razor blade locked in an extended position;

Figure 3 is an enlarged sectional view taken on line 3-3 of Figure 2; and

Figure 4 is a perspective view of the knife blade adjacent said razor blade.

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral It) represents an elongated sheath of any suite. le design provided with longitudinally extendin grooves l2 and I4, adapted to furnish channels for a pair of usual knife blades HS and i8 pivotally mounted at one end of the sheath.

To facilitate easy handling of the sheath, side pieces 2.!) are preferably secured to the sheath.

At the other end of the sheath is pivotally mounted an additiona1 knife blade 22 having a protuberance 23 adapted for movement into and out of groove 52 at one end, said blade being of such a design to permit both blades I6 and 22 to be positioned in groove l2 at the same time.

A guide aperture 2 1 is provided at one end of the sheath adjacent blade 22 and communicates with groove I6.

Slidably mounted at one end in the groove [4 and extendable through aperture 24 is an elongated razor blade 26.

For use of the razor blade, knife blade 22 is raised outwardly from groove l2 and the razor blade is extended by shaking the sheath downwardly. Upon the desired extension of the razor blade, the knife blade 22 is inserted into groove l2 so that the protuberance 23 bears against one side of the razor blade locking said blade in the desired position.

It is obvious that the razor blade may be completely removed from the sheath for replacement or repair if such is desired, by merely extending or shaking the sheath so that the razor blade 26 will extend completely through the aperture 24.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the construction, operation and advantages of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

What I claim is:

1. A knife comprising a hollow sheath having a plurality of longitudinal grooves therein, a razor blade slidably mounted in one of said grooves, said sheath having an opening at one end for engaging said razor blade, a knife blade pivoted to said sheath adjacent said razor blade, and a protuberance carried by said knife blade for engaging said razor blade to hold the latter against sliding movement.

2. A knife comprising a, hollow sheath having a plurality of longitudinal grooves therein, a razor blade slidably mounted in one of said grooves, said sheath having an opening at one end for engaging said razor blade, a knife blade pivoted to said sheath adjacent said razor blade, and a protuberance carried by said knife blade having a convexed bearing surface for engaging said razor blade to hold the same against sliding movement.

3. A blade holder comprising a handle having a plurality of longitudinal grooves therein, a first blade slidably mounted in one of said grooves, said handle having a guide opening at one end for receiving said first blade, a second blade pivoted to said handle adjacent said first blade for pivotal movement into and out of one of said grooves, and a protuberance integrally formed with said second blade having a bearing surface engaging said first blade to hold the latter against sliding movement when said second blade is pivfile of this patent: 1,493, 20

4 UNITED STATES PATENTS Name Date Ewart Apr. 2, 1878 Sweet Nov. 10, 1885 Edwards Dec, 23, 1908 Caron Jan. 18, 1921 Lochman Feb. 8, 1921 Evers May 13, 1924 

